Sasuke's completed Susanoo displays an unusually shaped bow on its left arm. The arrows it uses are produced in an orb in its third hand. The arrows fly very fast and have great piercing power, going through a tree created by Wood Release with ease. Kakashi, a ninja with impressive speed, resorted to using Kamui to warp the arrows away due to the impossibility of evading them. The bow also doubles as a shield which is strong enough to withstand powerful Wind Release attacks. The thickness of the arrows can seemingly vary according to the users choice to suit the situation.[1][2]

Trivia

After acquiring his Eternal Mangekyō Sharingan, Sasuke's Susanoo was able to wield a blade composed from the black flames of Amaterasu, which ignited anything that it pierced.[3] However, it is unknown as to whether this blade is an arrow or simply an enhanced sword.